Gearing.



P. GAETH. GEARING.

APPLICATION FILED SEPT. 27, 1907. RENEWED D30. 9, 1909.

957,763 Patented May 10, 1910.

WITNESSES fZVVE/VTOR ENTTED STATES PATENT @FFTQE.

PAUL G-AETI-I, OF CLEVELAND, OHIO.

GEARING.

esmea.

Application filed September 27, 1907, Serial No. 394,925.

To all whom it may concern:

Be it known that I, PAUL GAETH, citizen of the United States, residingat Cleveland, in the county of Cuyahoga and State of Ohio, have inventedcertain new and useful Improvements in Gearing, of which the followingis a specification.

This application is a division of my pending application No. 367,179,filed April 9, 1907, and relates especially to the adjusting mechanismfor the sparking igniter shown and claimed in said application.

The present invention is also applicable to any other kind of an igniteroperated by a shaft.

The object of the present invention is to provide improved means foradjusting the operating shaft, so as to advance or retard the ignition.

The invention is illustrated in the accompanying drawings, in which,

Figure 1 is a side View of the adjusting device. Fig. 2 is an end viewthereof.

The operating shaft which is connected in any suitable manner to theigniters or make and break mechanism is indicated at 25, and this shaftmay be set forward or back to advance or retard the spark. It carries aspiral gear 49 in mesh with a spiral gear 39 which is formed integralwith a sleeve having a collar 45 at the end. This sleeve, with the gearand collar, is slidable on the main valve or way-shaft 42 of the engine,the axis of which shaft extends to a right angle to that of the shaft25.

The collar 45 is engaged in a groove on the inner side of an annularhead or boss 48 Specification of Letters Patent.

Patented May 10, 1910.

Renewed December 9, 1909. Serial No. 532,252.

formed at the end of a split sleeve as which 'is movable along the camshaft by means of a crank pin projecting from a controlling shaft orturning rod 22 which may be extended to a position convenient foroperation by the engineer or attendant.

By turning the rod 22 the split sleeve 4L8 will be moved one way or theother along the way shaft 42 carrying with it the spiral gear 39, andthereby turning the shaft 25 to vary the set of said shaft with respectto the stroke of the engine, and to advance or retard the operation ofthe sparkers accordingly. The gear 39 and sleeve 45 are keyed 011 theshaft 42 to rotate therewith, but have lengthwise movement foradjustment as stated. The sleeve 48 is loose on the shaft, which turnstherein, and the collar is free to turn within the groove in the ring 48I claim 2- An adjusting mechanism comprising in combination, driving anddriven shafts, and

spiral gears between the same, a sleeve fixedto the gear on one shaftand slidable lengthwise on the shaft and having a collarat its end, asplit sleeve also slidable on said shaft and having an internal groovein which said collar fits, and a turning rod having a crank pin engagingthe split sleeve, to shift the same.

In testimony whereof I do afiiX my signature, in presence of twowitnesses.

PAUL GAETH.

WVitnesses T. L. PmRoE, WILL C. BLATT.

